1. Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and has no expiration date.

2. This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person.

3. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.31 to $30.30 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

4. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.31 to $30.77 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

5. 25% of the shares subject to the option vested on June 24, 2014, and the remaining shares subject to the option shall vest in 36 equal monthly installments thereafter, subject to the Reporting Person's continuous employment with the Issuer on each such date. The option is early exercisable by the Reporting Person.

6. The shares subject to the option shall vest in 48 equal monthly installments commencing on August 1, 2015, subject to the Reporting Person's continued employment with the Issuer through each vesting date. The option is early exercisable by the Reporting Person.

7. 20% of the shares subject to the option vested on July 29, 2017, 20% of the shares subject to the option shall vest on July 29, 2018, and the remaining shares subject to the option shall vest in 36 equal monthly installments thereafter, subject to the Reporting Person's continuous employment with the Issuer on each such date. The option is early exercisable by the Reporting Person.

Remarks:

/s/ Larissa Schwartz, attorney-in-fact of the Reporting Person

02/14/2018

** Signature of Reporting Person

Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person,
see
Instruction
4
(b)(v).